Caution: The 4 Most Dangerous $ex Positions For His Pen!s

Not to be a fun-sucker, but getting rowdy while getting it on can be risky business, especially for his package. While living dangerously is pretty freaking great, sometimes when you play with fire, you get burned.

Se x injuries don’t happen very often, but when they do happen, it’s usually due to where you’re having se x—not how you’re doing it, says Debby Herbenick, Ph.D., a research scientist at Indiana University and author of Great in Bed.

Because your footing or other means of support are unfamiliar, se x in places like your desk or in an airplane lavatory is a lot more likely to lead to injuries than a complicated pose, says Herbenick, citing research from the University of Maryland.

Here are four se x positions you may want to avoid—or at the very least treat with respect:

THE EAGER CHIEFThe Position: He’s standing on his toes while you’re sitting on a counter in front of him. The se x is usually spontaneous.

If you’re sitting on a countertop and he misses your va gina either high or low, his unlucky pe nis has nowhere to go but into your pubic bone or the counter.

Also Risky: Any standing position that has him on the tips of his toes. A momentary lapse of calf strength could send his manhood crashing into an unforgiving barrier.

THE OVER-EXHUBERANT SWISS BALL BLITZWhy It’s Risky: The Swiss Ball Blitz may add some bounce to his thrusts, but beware: “Pe nis breaks will be more common in any se x position in which his pe nis comes fully out of your va gina and then goes back in,” Herbenick stresses.

Because the Swiss ball creates an unusual amount of up and down inertia, too much oomph could lead to his pe nis slipping out of yoru lady parts just before gravity and momentum bring you crashing back down on him.

Also Risky: Stairway to Heaven, or any pose where you’re in the driver’s seat and the se x is especially vigorous.

If she’s on top, you have less control over the in-and-out motion, and so you’re more likely to slip out of her, Herbenick explains.

THE COWGIRL AND LEAN BACKThe Position: He’s on his back, you’re sitting on top of him. Rather than leaning forward with your hands on his chest, you lean way back.

Why It’s Risky: Like an elbow or knee, his ere ct pe nis can be “hyperextended” (cringe) if you put too much or too frequent downward pressure on the shaft, according to a study from the University of California, San Francisco.

Over time, this hyperextension can lead to Peyronie’s disease, or a buildup of plaques that causes his rod to bend while ere ct. That can make se x impossible, the UCSF research suggests.

If he feels tugging—or even a small joint-like crack near the base of his pe nis, your angle could be a little too extreme. Try leaning forward a bit more.

THE POGO STICKThe Position: Think of it as standing missionary. He’s holding up all your weight, bending backward, and to facilitate the old in-and-out he’s flexing his knees and bouncing you up and down on his pe nis.

Why It’s Risky: Anything acrobatic like this is a lot more likely to lead to back pain or strains for the guy, says Herbenick. Not to mention he could fall on your if his footing is off.